Link K M, Herrera M A, D'Souza V J, Formanek A G
Department of Radiology, Bowman Gray School of Medicine, Wake Forest University, Winston-Salem, North Carolina 27103.
Radiographics. 1988 Nov;8(6):1109-36. doi: 10.1148/radiographics.8.6.3205931.
From 3D MR scans, the authors have constructed 2D "silhouettes" that correspond to standard radiographic views of the heart. These images explicitly demonstrate the relationship of the surface anatomy to the internal anatomy of the heart and serve to indicate what chambers contribute to the heart borders seen on radiographs. The findings depart from conventional wisdom in at least four respects, including: the left atrium contributes to the left heart border in a frontal radiograph in only a minority of subjects, in steep RAO and lateral radiographs, the right ventricle does not always form the anterior heart border, in left anterior oblique radiographs greater than 30 degrees, the anterior heart border is formed predominantly by the right ventricle, and the left ventricle extends more craniad along the posterior margin of the heart than expected.
作者通过3D磁共振扫描构建了与心脏标准放射影像相对应的2D“轮廓”。这些图像清晰地展示了心脏表面解剖结构与内部解剖结构的关系，并有助于指出在X线片上构成心脏边界的是哪些心腔。这些发现至少在四个方面与传统观念不同，包括：在正位X线片上，只有少数受试者的左心房构成左心缘；在右前斜位和侧位X线片上，右心室并不总是构成心脏前界；在大于30度的左前斜位X线片上，心脏前界主要由右心室构成；左心室沿心脏后缘向头侧延伸的程度比预期的更大。
